public class Text {
    public static void main(String[] args) {
        int[] inorder = {9,3,15,20,7};
        int[] postorder = {9,15,7,20,3};
        Solution a = new Solution();
        Solution.TreeNode root = a.buildTree(inorder,postorder);
        System.out.println(root);
        System.out.println(root.left);


    }
}
